Index: test/tools/obj2yaml/lit.local.cfg
===================================================================
--- test/tools/obj2yaml/lit.local.cfg
+++ test/tools/obj2yaml/lit.local.cfg
@@ -0,0 +1 @@
+config.suffixes.add('.yaml')
Index: test/tools/yaml2obj/lit.local.cfg
===================================================================
--- test/tools/yaml2obj/lit.local.cfg
+++ test/tools/yaml2obj/lit.local.cfg
@@ -1 +1 @@
-config.suffixes = ['.yaml']
+config.suffixes.add('.yaml')